<!DOCTYPE html>
<?php 
$uns='';
if (isset($_REQUEST['do'])) {
	if (isset($_REQUEST['sel'])) {
		if (file_exists($_REQUEST['sel'])) {
			$uns = unserialize(file_get_contents($_REQUEST['sel']));
		}
	}
}
?>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<form>
<textarea rows="" cols="80" name="sel"></textarea>
<br />
<input type="submit" value="OK" name="do" />
</form>
<hr />
<pre>
<?php print_r($uns);?>
</pre>
</body>
</html>